Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 7b556613e2f81467…

MALICIOUS

Office (OLE) / .DOC

180.6 KB Created: 2019-04-25 13:36:00 Authoring application: Microsoft Office Word
MD5: bf448dd849e38068072e7f242e59a387 SHA-1: e70fca9132fd8b82a6409c2cb40b34062634f5e2 SHA-256: 7b556613e2f814670e721619781c1327dc6982655beef492a03e8b5449b7782b
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros, specifically an AutoOpen macro, which is designed to execute automatically upon opening the document. The macro utilizes GetObject and CreateObject to launch a WMI process, indicating an attempt to execute arbitrary code. This behavior is consistent with a downloader or dropper, aiming to fetch and execute a secondary payload. The ClamAV detection 'Doc.Downloader.Powload-6956244-0' further supports this assessment.

Heuristics 7

  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • ClamAV: Doc.Downloader.Powload-6956244-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Powload-6956244-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
32af03ec4a5a5553c8901477af4ee4c81c6b76f7317ce6e80cc68d09373297b1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 29266 bytes

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